The global climate warming arosed change of heat resource in Shanghai.For understan-ding change rule of heat resource in Shanghai,based on the analysis of air temperature and ground temperature data of 11 meteorological stations during last 13 years(1991-2003) in Shanghai,and for the comparison of the mean values during past 30 years(1961-1990),the statistical change of characteristic climatic values in the person of heat resource(air temperature,ground temperature,accumulated temperature,critical temperature and frostless season etc.) since the 1990's was studied.The results showed the annual mean air temperature increased by 0.9℃,the annual mean ground temperature increased by 0.5℃,the annual mean accumulated effective temperature ≥3℃ by 219℃·d,the annual mean increased accumulated effective temperature ≥10℃ by 77℃·d,the average period of steady-up 0℃ extended 12.5d,the average period of steady-up 10℃ extended 5.7d and the annual average frostless season extended 9.4d.Generally speaking,the heat resource increased during last 13 years(1991-2003) in Shanghai.The global climate warming was the main cause for the temperature rise in Shanghai,the effect of urban heat island caused regional difference in the range of temperature rise and widened the difference in geographic distribution of temperature as well.But the annual mean daily range of temperature becomes smaller,which will exert adverse effect on growth and upgrowth of major crops.The result of the study can provide scientific basis for even more reasonable programming development pattern of industry and agriculture of the city of Shanghai.